Minor incident

Buildkite: Small number of incoming GitHub Webhook failing

Affected: GitHub Webhooks

Current status of Buildkite: Operational — live Buildkite status

Timeline

1. Oct 1, 2026, 06:10 UTC
   identified
   Since 2026-09-30 20:52:36 UTC on 30 September, small amount of incoming GitHub webhook deliveries to Buildkite pipelines are being rejected, so the related builds are not created. For people who use GitHub.com may affect ability to receive status checks. We have identified the cause and are deploying a mitigation. This does not affect GitHub Enterprise Server and other SCM providers.
2. Oct 1, 2026, 06:33 UTC
   monitoring
   The mitigation is rolling out and we are seeing recovery. We will continue to monitor and provide an update.
3. Oct 1, 2026, 06:57 UTC
   resolved
   The error rate has returned to normal levels.

Updates as published by Buildkite (original).